I have a similar instrument, but in unplayable condition. I've always called it a Pearl Queen, although I can't remember where I got that term. It would need a lot of restoration, and I have most of the missing parts. If anybody wants to try fixing it, I'd take $100 plus shipping from Texas. There's lots of etched mother of pearl on it, and it would be a beautiful instrument if repaired. The only mark on it is "Concertina" as shown in the last picture. No maker shown. It came in a wooden box with metal corners. The paper inside showing the button arrangement has a date of 1911.